I am looking for suggestions for PFDs that fit kids well when they transition through the kids sizes and into adult sizes. My son is 11 years old and about 90 lbs. I want to get him out of his 50-90 lbs rated youth PFD into an adult PFD, but the small adult PFDs don't seem to fit him correctly. During the off season, I bought him an NRS Big Water (universal fit). It does adjust to fit correctly, but is not a comfortable fit and tough for him to put on without assistance. Please let me know if you've found good fits for the kids when they top 90 lbs. Thanks!